I came back to play after many months. Since there was a new version, I deleted my install and got the new version, which toasted my self-hammer vampire, sorry for anyone I let down there.
For this attempt at fun, I picked an embark next to a purple city of some sort. The first thing I did was build a wall. I dug a trench around the wall. Up on top of the wall I built out 1 square to make an over hang. I filled in the inner wall to avoid diagonal pathing through the wall! I laid down floor all around my trench, and in the bottom of my trench, to prevent trees from making a path into my fortress.
Soon a vile force of darkness arrived. Ten goblins. Disappointed, and not yet having a military, I simply closed the drawbridges. The ten goblins hung out near my fortress murdering humans who came to visit the tavern.
But then, a bronze collosus came! It fought with the goblins. They all ended up dead. The description of collosus only told me that it was a bronze statue intent on mayhem. Having nothing better to do, I put the collosus on follow and watched it run around. Several times it climbed up into the trees and wandered around. But a couple of times, a had a weird bug on my screen that made no sense. It was almost like the collosus had jumped over my entire fortress, a distance of about 75 units. Then I took some time off from watching the collosus to work some more on a hospital. While I was down in the fortress, setting up traction benches, I suddenly got a message that a farmer had been found dead!
Jumping up to the surface, that bronze collosus was inside my walls! Thankfully, when the goblins had shown up I'd recruited ten dwarfs into a military, and told them to train out in the sun so that they would at least get over the vomit. Amazingly, the military defeated the collosus while I wasn't looking!
I was a bit stumped as to how it got inside though. Maybe it climbed? I had no idea. I did a d-b-c to recover all the free goblinite the Colossus had left me, and to hopefully allow the collosus corpse to be taken to the refuse pile.
But it didn't leave a corpse. It left a statue, which I now owned. A statue of....a giant monarch butterfly. It weighs 495 of whatever units dwarves weigh things in. It hadn't been climbing around in the trees, it was flying. And those weird visual glitches where it looked like it jumped over my fortress were mostly exactly that...
I thought my wall was perfect. I knew if a dragon came that I was doomed. But, I've only ever seen one dragon, and I can retire a fortress pretty quickly if a second one ever comes.
Obviously I need to make a roof of floor grates, right?